Towards optimal single-photon sources from polarized microcavities

Research output: Contribution to journalJournal article – Annual report year: 2019Researchpeer-review

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  • Author: Wang, Hui

    University of Science and Technology of China, China

  • Author: He, Yu-Ming

    University of Science and Technology of China, China

  • Author: Chung, Tung Hsun

    University of Science and Technology of China, China

  • Author: Hu, Hai

    National Center for Nanoscience and Technology, China

  • Author: Yu, Ying

    Sun Yat-Sen University, China

  • Author: Chen, Si

    University of Science and Technology of China, China

  • Author: Ding, Xing

    University of Science and Technology of China, China

  • Author: Chen, Ming-Cheng

    University of Science and Technology of China, China

  • Author: Qin, Jian

    University of Science and Technology of China, China

  • Author: Yang, Xiaoxia

    National Center for Nanoscience and Technology, China

  • Author: Liu, Run-Ze

    University of Science and Technology of China, China

  • Author: Duan, Zhao-Chen

    University of Science and Technology of China, China

  • Author: Li, Jin-Peng

    University of Science and Technology of China, China

  • Author: Gerhardt, Stefan

    Universität Würzburg, Germany

  • Author: Winkler, Karol

    Universität Würzburg, Germany

  • Author: Jurkat, J.

    Universität Würzburg, Germany

  • Author: Wang, Lin-Jun

    University of Science and Technology of China, China

  • Author: Gregersen, Niels

    Department of Photonics Engineering, Technical University of Denmark, Ørsteds Plads, 2800, Kgs. Lyngby, Denmark

  • Author: Huo, Yong-Heng

    University of Science and Technology of China, China

  • Author: Dai, Qing

    National Center for Nanoscience and Technology, China

  • Author: Yu, Siyuan

    Sun Yat-Sen University, China

  • Author: Höfling, Sven

    Universität Würzburg, Germany

  • Author: Lu, Chao-Yang

    University of Science and Technology of China, China

  • Author: Pan, Jian-Wei

    University of Science and Technology of China, China

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An optimal single-photon source should deterministically deliver one and only one photon at a time, with no trade-off between the source’s efficiency and the photon indistinguishability. However, all reported solid-state sources of indistinguishable single photons had to rely on polarization filtering which reduced the efficiency by 50%, which fundamentally limited the scaling of photonic quantum technologies. Here, we overcome this final long-standing challenge by coherently driving quantum dots deterministically coupled to polarization-selective Purcell microcavities—two examples are narrowband, elliptical micropillars and broadband, elliptical Bragg gratings. A polarization-orthogonal excitation-collection scheme is designed to minimize the polarization-filtering loss under resonant excitation. We demonstrate a polarized single-photon efficiency of 0.60±0.02 (0.56±0.02), a single-photon purity of 0.975±0.005 (0.991±0.003), and an indistinguishability of 0.975±0.006 (0.951± 0.005) for the micropillar (Bragg grating) device. Our work provides promising solutions for truly optimal single-photon sources combining near-unity indistinguishability and near-unity system efficiency simultaneously.
Original languageEnglish
JournalNature Photonics
ISSN1749-4885
DOIs
Publication statusAccepted/In press - 2019
CitationsWeb of Science® Times Cited: No match on DOI

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